Calculating machine



Nov. 19, 1940. H RAUH 2,222,373

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CHOP U- Hermann Haul.

Nov. 19, 1940. H. RAUH 2,222,373

CALCULATING MACHINE Filed Sept. 17, 1954 13 Sheets-Sheet 8 63 73 i i ,235 55 5 1 l 1 I F1913 49 i 75 i /.235 I77 1/2772? 1/ Nov. 19, 1940, H. RAUH CALCULATING MACHINE Filed Sepi. 1'7, 1954 13 Sheets-Sheet 9 Inf/swish Herrrrzfiw Haw/Z2 y M AZZorrrey H. RAUH CALCULATING MACHINE Fil ed Sept. 17, 1954 .15 Sheets-Sheet 1O Nov. 19, 1940. H. RAUH CALCULATING MACHINE Filed Sept. 17, 1934 13 Sheets-Sheet ll Nov. 19, 1940. H. RAUH CALCULATING MACHINE Filed Sept. 17, 1934 13 Sheets-Sheet 12 Fig. 20a

Nov. 19, 1940; H. RAUH 2,222,373

CALCULATING MACHINE Filed Sept. 17, 1934 13 Sheets-Sheet 1s M M8 424 m B Hermann Raul AZZ m-w y Patented Nov. 19, 1940 UNITED STATES PATENT OFFICE CALCULATING MACHINE Germany Application September 17, 1934, Serial No. 744,441 In Germany September 18, 1933 7 Claims. (01. 235-60) The invention relates to a calculating machine with a plurality of accumulators and has for its object to render these accumulators available in the most general and diverse manners. In particular, the accumulators can be rendered operative in a definite column both automatically and manually, singly or in groups, and in any desired sequence. Further, when a desired accumulator has beenselected by the operation of manual setting means, any accumulator which has been rendered operative by paper carriage movement is automatically rendered inoperative.

The invention is illustrated by way of example in the accompanying drawings, in which:

15 Figure 1 is a diagram of an electric selector mechanism comprising nine accumulators,

Fig. 2 is a side elevatior. of an accumulator drum having eighteen accumulators and equipped for electrical operation,

Fig. 3 is a section on the line 33 of Fig. 2,

Fig. 4 is a section through the accumulator drum on the line 4-4 of Fig. 5,

Fig. 5 is a section through the accumulator drum on the line 55 of Fig. 4,

Fig. 6 is an elevation of the accumulator drum viewed from the operating side, the operating mechanism being removed,

Fig. 7 is a view of the operating side of the accumulator drum,

Fig. 8 shows a drive group for the accumulator numeral wheels of the drum,

Fig. 9 is a side elevation of Fig. 8,

Fig. 10 is a detailed View of the carriage jockey plate,

Fig. 11 is a view of the carriage contact holder,

Fig. 12 is a plan view of the parts shown in Figs. 10 and 11,

Fig. 13 is a view of an accumulator on large scale, a

Fig. 14 is a side. elevation corresponding to Fig. 13,

Fig. 15 is a section through a solenoid coil and associated parts on a greatly enlarged scale,

Fig. 16 is a section through the accumulator of a calculating machine of modified construction having adding and subtractingaccumulators,

Fig. 17 is an elevation of the accumulator of a calculating machine as-shown in Fig. 16 viewed from the operating side with the operating mech- 50 anism removed,

Fig. 18 is an elevation of the operating mechanism of the accumulator shown in Figs. 16 and Figs. 19 to 21 show a switch forthe parallel 55 connection of two pairs of accumulators, Fig. l

being a cross-section and Figs. 20 and 21 being side views in two different switch positions,

Figs. 20a and 210. are wiring diagrams for the switch of Figs. 20 and 21,

Fig. 22 is a cross-section of a switch mechanism for the selector keys, taken at line 22-22 in Fig. 23, the parts lying in front of the section line being indicated in dotted lines,

Fig. 23 is a planview corresponding to Fig. 22,

Fig. 24 is a partial elevation corresponding to Fig. 23, and

Fig. 25 is a vertical cross-sectional view of the complete machine.

As an example embodying the invention there is illustrated in Fig. 25 the calculating machine in which the numbers to be calculated are transmitted in known manner into accumulators, by means of actuators. The actuators are the parts lSl, I52, with which the accumulators'lOB, can be brought into engagement. The printing of the numbers which during a machine operation are either entered in the accumulators 106, 5.0 or are taken by totalling from these accumulators, is eilected by means of type-carriers 169. The types on'the type-carriers 160 in this operation strike against a platen roller which is arranged on an automatically movable paper carriage. In the following the selection of the accumulators 50 is explained in detail.

ARRANGEMENT or This Emcrmc SELECTOR Muen- ANISM Fig. 1 shows a diagram of an'electric selector mechanism for nine accumulators which can be selected both by selectorkeys la to 12', and also in dependence upon the movement of the paper carriage ill by means of contacts 38a to 382'. The selection of the accumulators is eiiected with the aid of solenoids lie to Hi, the current supply of which is obtained from lines 22 and 23. In the line 22 is arranged a main switch 24 from which the line runs to a bus conductor 40 for the coils of the solenoids, Hi, H72, Hg, llf, lie, and which can be extended by switch connection at I211, 120,

' i219, 12a, also to the coils of solenoids lid, llc,

for the switch 24 areahowninl'lg. 1.

These drive means com l'ise a motor operatingashaitzlthroughsuitablegearingonwhich shaitiscarriedacrankfl. Thiscrankllisconnectedbymeamoiathrustrodatoacrank 25sothattheshaft55willreceiveanoscillation throughahout60. Thesbaitllisthemainshait o! the calculating machine, the outline of whichmachineisahownatli. Onthemainshaftll -ismountedaturthercrank5lwhichachratesa belonging to the solenoid III is clwed, a current will flow upon closure of the main switch 24 from the line 22 over 24, 45, Ill, 38], 31, 35, 25, 244, to

40 the line 25, and operates an iron core of the solenoid II] in such a manner that the accumulator corresponding to the set carrier contact is selected.

The selection of an accumulator by one of the selectorkeys lato litakesplaceasiollows. On dep any one 01' the selector keys a changeoverbarll isflrstshiitedtotherightwhereby the change switch 25 is so actuated that the conductor 35 leading to the contacts 51, 35 is disconnected from the line 25 and the conductor 42 is connected to said line. The change switch 25 serves for opening and closing the current paths 42, 259, 23' and 35, 259, 25 whereby either the contacts 35 or the selector keys la to Ii can be made operative or inoperative. By the said actuation of the switch 25 all the contacts 55 are rendered inoperative and the selection of an accumulator by the selector keys can take place without hindrance and independently of any accumulator which may have been selected by the movement of the paper carriage II. On depression of the selector keys the contacts 2a to 2i are actuated which are connected through the bus conductor 42 and the switch 25 to the line 23 and are also connected in similar manner as the carriage contacts 55, with the solenoids Ila to Hi. If, for example, the key I e is depressed, then the solenoid He is switched in by the associated contact 2e, and at the same time the solenoid III, shown in Fig. 1 as switched in by the carriage contact 38f, is rendered inoperative by the actuation of the switch 25, that is by the disconnection of the conductor 39. Selection by means of the selector keys thus has preference over selection by the carriage, which the advantage in the operaheldclosedforadeterminedperiod. Drivemeans.

timottbemacbinethatanyaccumulatorcanbe operatedasdeairedwithouthindranceduetothe carriage position.

According to a further feature of the pruent invenflon, various accumulators can be into groups and from these groups individual accmnulators can be selected automatically or manually and rendered operative for specific requiremeats. For example, according to Fig. 1 the accumulators associated with the solenoids '0, D

are into a group with parallel connection through a conductor llab, and the accumulators asociated with the solenoids llc, lid are similarly grouped by a conductor l5cd. Thae groups are disconnected from the conductor 45 by interrupting the switch connections l2c, l2b, l2c, I 2d. Furthermore, the solenoids "I la, llb, He, He! communicate by connectors Ila, l4b, l4c, l4dtoachange switch45towhichthe conductor 45 is connected. This change switch 45 is operated by a lever 44 which is provided for setting an adding and subtracting totalizer I05 (Fig. 25) to its addition or subtraction position. The lever 44 may be actuated manually or automatically, for example, in dependence upon the positive or negative nature of the accumulator content of the adding and subtracting totalizer I55 (Fig. 25). In its addition position according to Fig. 1, and through corresponding contacts of the switch 45, the conductor 45 is connected with the solenoids llb, lld. Ii'in this addition pofltion, in adeflnitepcsition oi'thepaper carriage l5 acoutact 55a, 55b is closed, or a contact 211, 2b is closed bymeans oi selector keysla, lb, then the accumulater with the solenoid ilb is automatically rendered operative to receive a positive number set up in the machine or present in the adding and subtracting totaliaer 155. By closing one of the contacts 55c, 55d or 20. 2d, the lever 44 remaining in the same position, the accumulator controlled by the solenoid lld is reudered operative to receive a positive nmnber. On the contrary, with subtractive podtion o! the totalizer I55 and in the changed position-o1 the lever 44 indicated in Fig. 1 by a minus symbol, if the upper left and the lower right contact of the switch 45 are closed, only numbers can be registered in the accumulators associated with the solenoids Ila, llc. Thereby an accumulator o! a pair of accumulators corresponding to the position of the lever 44 is automatically made operative by means of the paper carriage or by the selector keys. Arrangements of this kind are of particular advantage in bookkeeping operations in banks and business oflices, in which it is desired to keep balances separate from each other according as they are positive or negative, and to accumulate balances according to their positive or negative character in diil'erent accumulators and to print these balances either automatically in predetermined columns or selectively in desired columns, of a printed sheet. The amounts accumulated in the accumulators of a group can be printed automatically in dependence upon the paper carriage movement in one or more definite columns predetermined or at choice in any desired column, and can be transferred to an adding and subtracting totalizer I06 in order to determine the diflerence of the amounts of a group.

Instead of the connections ltab or I5cd two contacts 38a, 38!; or 38c, 38d may be closed. This may be eiiected, for example, by providing two rollers 36 or a single broad roller 0! the paper carriage {or connecting the two contacts 35a, 35b or the two contacts 38c, 38d with the conductor 39. Similar results can be obtained by effecting a connection of the twocontacts 2a, 21) or 20, 2d.

This arrangement is not limited to the selection-of groups comprising only two accumulators, which, as in the example cited, are utilized preferably for the automatic separation of positive and negative balances. This part of the inven- I 'tion whichis claimed as a separate integer includes on the contrary the selection of an accumulator group of any desired number, and of any desired-number of such accumulator groups,

from which predetermined accumulators can be further automatically selected and rendered operative by. changeover devices.

The group operation of accumulators, which in the present example serves to separate amounts to be printedjin a' single column according to positive and negative values, by means of the lever 44, can be rendered inoperative by switch means. This is effected by opening the connectors Ma, I417, l4c, 14d and the connections lBab, I8cd and closing the switch connections l2a, I21), I20, i211.

This renders the supply line to the change switch 46 inoperative, and theaccumulators associated 25.

with the solenoids Ha to lid are selectable like the other accumulators associated with the solenoids 1 le to 1 ti. It'is, moreover, of great advantage in respect of the range of use of a machine that groupselection for the separation of balances and thus also the selection of any desired number of accumulators and any desired number of accumulator groups from which certain accumulators and accumulator groups can be automatically further selected and rendered operative, can

be made inoperative and the group accumulators wholly or partly rendered available for other operations, for example for the usual column work. This feature of the invention therefore also constitutes an. independentinteger not necessarily combined with'the other features of the invention.

The contacts 2a to 2d are shown in Fig. l as rotated about their pivots in such a manner that upon actuation'of the selector keys la to Id no closure of the contacts takes place. In the present instance, this'has the purpose of preventing key selection ofthose accumulators which are disconnected for the separation of positive and negative items in -,determined columns. The other contacts 2e to 22' also can be rotated singly or as a whole about their pivots and thereby made inoperative upon actuation of their associated selector keys is .to ii. By shifting the switch 244, moreover, the connection of the line 23 with the conductor 42 can be completely interrupted, thus disabling the entire key selection and providing accumulator selection only by means of the paper carriage. Theswitch 244 for any one row, or all rows of the contacts 2a to 22' can be provided with locking means in order to render the actuation of such switches by the operator serving the machine, impossible.

' In accumulatorselection by the keys la to ii, a separate symbol is printedin known manner upon depression of a key, whereby the selected accumulator is distinguished whereas in accumulator selection by the paper carriage no symbol Figs. 2 to 1'5 illustrate a calculating machine are provided eighteen accumulators for addition only in a fixed drum,'these accumulators 50 (Figs. 4, 5, 13 and 14) being guided by means of guide members 49 mounted on their shafts in radial slots of side plates 53, 54 (Fig. 4). The guide members 49 are fixed by means of screw-69 on the shafts 51 (Figs. l3, l4). and have round collars 51 (Figs. 4, 13) inside the side plates 53, 54, which collars have grooves for the reception of tension springs 55 anchored to pins 56, said pins 56, said springs operating generally to urge the accumulators outwardly from the center of the drum, so that the gears 58 engage the locking and alining bails 59 (Fig. 5). Since the collars 51 have greater dimensions than the guiding portions of the guide members 49, they secure the accumulator shaft 5i against axial displacement.

The accumulators are actuated by journaled actuator gears 60 (Figs. 8 and 9) associated in common with all the accumulators and having cam wheels 6!! for tens carrying. Thewheels 60 and iii are loosely mounted on a sleeve I95 which is fixed between two frames I95, 59! mounted in the side plates 53, 54 by meam of the through-going shaft H38 and two nuts I99. On the frames 196, l9! are secured attaching lugs 240 and'also guide combs 24! for spacing all the wheels 60, GI and also laterally bracing the frames I98, l 97 relatively to each other. The parts illustrated in Figs. 8 and 9 constitute a closed unit which can be mounted in and removed from the accumulator drum in a. simple manner.

The accumulators 50 are brought into engagement with their respective 'actuatorwheels 60 and cam wheels M in the following manner: On the plates 53, 54 there are pivotally mounted for each accumulator a pair of levers 62, 63 on shaft 64 (Figs. 5, l3 and 14). These levers have at their outer ends oblique cams 65 cooperating with rollers 56 on the ends of the accumulator shafts in such a manner that on rocking of the levers 62 and 63 the accumulators, owing to the pressure of the cam 65 on the roller 66, are brought into engagement with the actuator wheel 60. In order that the screws 69 of the guide members 49 shall not contact with the side plates 96, 591 during the engaging movement, the side plates I98, 191 have recesses 2 32 (Fig. 9) to provide clearance for projecting members.

In order to engage an accumulator, the levers 62, 63 have to be connected with an engaging wheel 61 (Figs. i, 6 and 7). This is efiected by means ofthe solenoids Ha to Hi. The return of the levers b2, 63 is effected by means of springs 58 (Figs. 4 and 13) anchored to the shafts 54 and the side plate t l. The connection of the levers 62, 63 with the engaging wheel 87 by the action of the solenoids Ha to Hi takes place as follows: Each solenoid coil has guided'therein an iron core '19 (Figs. 3 and 15) having screw connection with a core ll of non-magnetic material, preierably aluminum. Owing to this formation of the core of a magnetic and a non-magnetic part, it results that upon energizing the solenoid the drawing-in movement of the iron core TB isdirectly converted into an expulsion movement of the aluminum core H. The aluminum core 11 carries on its front end a collar 12 which when'the core is expelled from the coil bears against a coupling pin 13 (Figs. 4, 13). The coupling pin 13 extends through a hole in the lever 53, openings in the plates 54 and 53,

and a hole in the lever 52 such a manner that it can slide longitudinally, and it can engage holes19(Flgs.6and7) intheeng gwheel 91. It is retained in i inoperative position by a spring 19 (Figs. 4, 13). Upon energiaation of amlenoidbyclosingoi'themainswitch the aluminum core 1| is expelled, whereby its collar 12 forces the coupling pin 19 against the pressure of the spring 19 into a hole 19 of the engaging wheel 61 whereby the levers 92, 99 connected to the coupling pin 13 are obliged to follow the movement of said wheel. The 8 8 8 8 wheel 61 is so moved that the accumulators are brought into and out oi engagement at the proper instant of the machine operation as required for the various functions of the machine, such as addition. total-taking, or sub-total-taking.

Addition Since in the illustrated example the accumulators in addition must be made operative in the second half of a'work operation of the machine, the engaging wheel 61 performs an angular movement at the beginning 01' the second half of the work operation oi the machine, and carries along with it the pin 13 projected by a solenoid, whereby the associated levers 82, 99 cause their cams to slide an accumulator into operative position.

The movement of the engaging wheels 91 is eilected from a thrust rod 19 (Figs. 1, 'l and actuated by the machine drive, the rod 19 being connectedtoanarmwhichisiastonthemain drive shaft 99 (Fig. 25). The thrust rod 16 is jointedly connected with a drive disk 11 rotatable through about on a pin 19 carried by a plate 19 arrangedparallel to the side plates 59, 54. On the plate 19, a slide member 92 is guided by meats of pins 99,", 91 and slots 99, 99, 99. Springs 99, 99 urge the slide member 92 to the left in Fig. 7, the slots 93, 99, 99 hearing against the pins 99, 9|, 91. The slide member 92 carries a pawl 91 pivoted on a pin 99 and held by a spring 99 in its normal pomtion. During the first hall of the work operation of the machine the drive disk 11 rotates in the clockwise direction. In this operation a pin 99 fixed to the disk presses the pawl 91 backwards against the action of the spring 99 until at the end of its movement the pin 99 slides along an arm 92 of the pawl 81. At the beginning 01 the backward movement, the drive disk 11 rotates reversely and the pin 99 bears in a notch. 9I in the pawl 91, thereby moving the latter and the slide member 92 to the right. On the plate 19 a locking pawl 92 for the slide member 92 is pivoted about a pin 93, which pawl hasa rearwardly extending arm 99 carryi g a striker pin 95. At its front end the pawl has a pin 96 cooperating with a cam hump 91 on the 'drive disk 11. A spring 99 urges the pawl 92 into such a position that the pin 96 bears against the curved edge of the drive disk 11.

When the slide member 92 is forced to the right bythe pin 99 arriving in the notch 9i of the'pawl 81 upon reverse rotation of the drive disk 11, the pawl 92 engages behind a tooth 99 of the slide member 92 and locks the same in its advanced position. vWhen the pawl 91 reaches its end position determined by a stop I91, the pin 9Il slides out oi the notch 9I. The pawl 91 y then returns to its position of rest under the action of the spring 99. The slide member is still held in its advanced position by the pawl 92. Finally, however, the hump 91 of the drive disk 11 actuates the pin 99 of the pawl 92 and releases it against the action of the spring 99 from its engagement with the tooth 99 01 the slide member 92 whereby the latter also under the action or the springs 99, 99 can return to its initial position.

While the slide member 82 is moving to the right it actuates through a roller I99 rotatably attached to itsright hand lower end, a cam plate Ill rotatable about a pin I92, the cam plate being thereby rotated clockwise and causing a roller I99 mounted on a' double-armed lever I93 to roll up to its portion of" enlarged diameter. This rocks the lever I99 about the pin I95 and the rocking movement is transmitted through a thrust rod I99 Jointed at its other end, to the engaging wheel 91 which-wheel in its rotation shifts the pair of levers 92, 99 with which it is connected by the coupling pin 19, whereby the cams 99 01' the lever pair move an accumulator 59 radially into the engagement position.

The return movement of the engaging wheel 61 is effected by a spring, not shown. The return movement of the levers 92, 99 is eflected by 99. and the corresponding accumulator 99 is drawn by its springs 95 out of engagement with the actuator wheel 99 and into engagement with the locking and alining ball 99.

To prevent the engaging wheel 91 from moving backwardly too rapidly and withdrawing the engaged accumulator before a tens carrying extending over all its numeral wheels is completed, the cam plate I9I is connected with a brake. A plunger rod 191 is jointed to the cam plate "I, the plunger of'which reciprocates in a brake cylinder I99. At the lower end of the brake cylinder I99 there is arranged a valve with a spring urged needle I99 by opening which a large flow orifice can be obtained enabling the braking to be wholly or partly annulled. Use is made of this device in total-taking as hereinafter described. a

Non-addition If an accumulator is not to be engaged either during the first or the second hall of a work operation of the machine, movement of the slide member 92 is prevented by removing the pawl 91 entirely out of the path of the pin 99. For this purpose dogs III, Figs. 7 and 25, on the paper carriage are provided to rock a double-armed lever H2, H9 about its pivot ill, this lever being under the action 01' a tension spring 291. Thereby and through a pull rod II! a pawl II9 with a plurality oi arms is rotated about a pin II1 on the plate 19. A similar rocking movement can also be eflected from a rod I99 also attached to the pawl H9 and connected with a non-addition key, not shown. One arm 01 the pawl II9 carries a pin II9 engaging in a slot H9 0! a push rod I29. The other end of the rod I29 is jointed at I2I to'a lever-I22, I29 rocking on a pin I29.

At the lower end of the lever arm I29 there is jointed a slide I29 guided by a pin I29 engaging a slot I21 in the slide. The front edge of the slide I29 cooperates with a pin I29 of the pawl 91. In the above mentioned rocking of the pawl N9, the pawl 91 is so rotated on its pivot 99 by the rear part of a shoulder 238 of the track I35 by the right end of the lever under the influence of a spring. The slide I35 is,-therefore, locked when the machine is set on non-addition.

Total-taking In taking a final total, in the illustrated example, the accumulators must be in engagement during the first half of the work operation of the machine and outof engagement before the beginning of the second half of the work operation, that is in their zero position. The slide member 82 must thus be advanced to the right at the very beginning of the right hand rotation of the drive disk 11, and during its return rotation to the left the pawl 81 must not be influenced by the pin 90. To drive the slide member 82 during the first half of the operation of the drive disk I1 there is provided a pin I30 fixed to the drive disk I1 and which can cooperate with a pawl I32 rotatable on the pin I3I of the slide member 82, which pawl I32 is similar to the pawl 81.

To carry out atotal-taking operation the pawl I32 with its arm I33 and notch I34 is shifted in the following manner into the path of the pin I30. By pressing thetotal key, and also by pressing the sub-total key, a slide. I35 is shifted longitudinally to the left, this movement taking place through a full stroke in total-taking, and through a half stroke in sub-total-taking. The slide I35 has slots I36 for its guidance on pins I31 and is connected at one end through a link I38 with a lever I39. Upon depressing the totalkey the lever I39 receives a full stroke rocking movement causing the slide I35 to move to the left by the full distance. This causes a heel H40 on the slide I35 to separate from a pin IN on the pawl I32 whereby the latter under the tension of a spring I42 rotates about the pivot 838 and arrives in the path of the pin I30. Upon displacement of the slide I35 to the left, a pin 3 thereon'also cooperates with the lever arm 922 rocking it counter-clockwise about the pivot 1124 so that similarly in the case of non-addition previously described, the pawl 81 is rocked out of the path of the pin 90. The lever arm H3 is thus moved so far to the right that it comes into contact with the pin 95 of the arm 34 of the pawl 92 pivoted at 93, and thus prevents the pawl 92 from engaging behind the tooth 39 of the slide member 82. The drive disk J11 now commences its rotation, the pin I30 pushes the pawl I32 and the slide member 82 to the right so that the selected accumulator is rendered operative during the first half of the machine operation. At the end of the first half of the operation of the machine, the pin i30 passes the pawl I32 and the slide member 82 springs backwards,.the pawl 92 being prevented from dropping into the tooth 99. Thisspringing back of the slide member 82 must take place rapidly in order that at. the beginning of the return stroke of the machine the actuator is reliably out of engagement with the actuator toothed wheels 60'. In this case the retardation of the return movement of the slide member 82 by the brake device I81, I08 is annulled, for which purpose a doublearmed lever 243, I44 is provided, fulcrummed at I02. The fork-shaped end of the lever am 243 embraces a pin I45 mounted on the slide I35. During movement of the slide I35 the lever 243, I44 is therefore rotated counter-clockwise. The

lower'end ofthe lever arm I44 inthis movement causes a bent portion thereof to press against the valve needle I08 and establishing communication between the brake cylinder I08 and the atmosphere, annulling the braking action.

During the entire total-taking operation the slide I35 is retained in its displaced position to the left. This is effected by means of an angle latch I46 having a slot I" for guiding it on a pin I48, and drawn upwardly by a spring I49. The angle latch is unable to follow the drive disk TI into the position of rest because it is jointed at its lower end to the arm I50 of a double-armed lever I50, l5I, the arm I5I of which bears against a pin i52 on the drive disk TI. As soon as the drive disk ll commences the forward stroke of its oscillating movement, the pin I52 is moved away from the arm I5I, so that now the angle latch I46 'can respond to the tension of its spring I48 and engage behind a projection I53 of the slide I35. n

the return stroke of the drive disk 11 the pin I52 again encounters the arm II and thereby releases the locking. The slide I35 is then forced to the right, into its position of rest by its spring gagement must remain in engagement after printing the total so that the subtotal taken from it is again brought into the aocrunulator. The necessary setting movements of the mechanism are effected by longitudinal displacement of the slide 635 under the action of a sub-total key, the stroke, however, being only half the stroke ac-' complished in total-taking. This half stroke is suflicient to release the pawl I32 which is also actuated in total-taking, so that this pawl, as in total-taking, arrives in the path of the pin I30. During the operation of themachine theangle latch I46 engages behind the projection I84 of the slide I35 in similar manner as it engages behind the projection I53 after the full stroke in total-taking. Since the pin I43 in the short stroke of the slide I35 does not reach the lever I22, I23, the pawl 92 is not prevented fromdropping. The selected accumulator is .thus engaged in the first halt of the work operation of the machine as in total-taking, but as in addition the pawl 92 drops and holds the slide member 82 during the second half of the work operation in its right hand displaced position. Thereby the selected accumulator remains in engagement as during addition, until the hump 9'I bears against the pin 86 and releases the pawl 83 to permit the slide member 32 to return to its normal position. The lever 55 243 upon taking a sub-total is not shifted sufllciently to open the valve I09.

In a certain mode of operation of the machine, namely when the carriage after it has traversed a plurality of summation columns, enters a nonaddition column and the total key has been kept depressed either for convenience or inadvertently, it may happen that in the non-addition column a row. of nines is printed, because by depressing the total key the locking of the rack sectors is released' To prevent this, the carriage when it moves from a total column into a non-adding column and also when the total key remains arm I59 fulcrumed at I58,.is shifted to the right and through intermediate members not illustrated again renders operative the locking for the rack sectors. 1f the total key is not depressed when the carriage springs into a non-adding column then the total-taking device is locked as a result of rocking of the lever Ill which pushes a spring pressed pawl 4 below the lug lll of the totalling slide Ill (Fig. 'I).

III

Tms Cmnns The drive of the actuator or number transfer wheels llisobtainedfromthetypebars Ill (Fig. 5) which in turn are driven by the rack sectors Ill. The type bars Ill are connected at their lower end with racks Ill which can slide longitudinally by a certain amount relative to the type bars and which are forced downwardly by means of springs Ill, Ill attached between the type bars and the racks. The racks Ill are in driving connection with the wheels ll either directly orthrough intm'mediate wheels Ill en-. gaging their lower ends.

The gear wheels ll of the accumulators ll have tens carrying humps Ill (Fig. 13) cooperating with corresponding teeth Ill (Fig. l) of a tens carrying wheel lI servingallofthewheels ll of the same digital order. Each tens carrying wheel lI hasasetofteeth Illteethin the arm Ill of a three-armed lever Ill, Ill, "I

(Fig. 5) and afurther movement of-therack Illv action of its spring Ill, the bent portion I'll armed lever Ill, I'll, I'll, there is arranged a control device actuated by the machine operation, in the present construction a flat sided shaft Ill, the rotation of which shifts the lever Ill, I-ll against thejaction 0f the spring'lll, and the spring I'll whenthenotch lllisreleasedisfreed.

and enablesthe three-armedlever Ill, I'll, I'll to returntorestpositiontogetherwiththecam wheel ll positively connected thereto by the teeth Ill. The connection of the lever arms Ill with the cam wheels lI- arranged in the accumulator drum through the loosely engaging teeth Ill has the advantage that the accumulator drum can easily beremcved from themachineand equally easilyremountedthereinwhenthemachineis being assembled and repaired.

The calculation with tens carrying in the accumulators ll serving for accumulation of amounts proceeds in the following manner.

In forward operation of the calculating machine the racks Ill which are'gulded by rods Ill, Ill traversing slots therein, are raised according to the digits whereby through through a certain amount.

the agency of the intermediate wheels Ill the amount transferring wheels or actuator wheels ll engaging the said wheels Il5 are correspondingly rotated, and in addition the engagement of the accumulator selected in the above de-- scribed manner takes place before the beginning of the return stroke. During the return stroke of the actuator wheels ll 'the digits are transferred into the corresponding accumulator ll.

If in this procedure one of the numeral wheels has passed through the tens position, then its tens carrying hump Ill cooperates with the tooth Illof the tens carrying wheel or cam wheel ll of the next higher order and rotates this The lever Ill, Ill, I'll connected through the teeth Ill with the wheel lI isthereby displaced against the tension of the spring Ill. The bent portion of the lever Ill engages the' shoulder Ill and holds the lever Ill, Ill, ill in its displaced position. When subsequently the type bar Ill and the rack Ill of the next higher order are lowered again, the projection Ill passes beyond the bent portionof the arm I'll. The rack Ill turns the intermediate'wheel I of the next higher order -by the amount of the additional lowering and also the associated digit transfer wheel ll which latter actuates the asociated accumulator wheel through one step.

The restoration of the members displaced in tens carrying is eflected in the illustrated construction during the next crank operation, and in the following manner.

A pin Ill mounted on the drive disc 11 (Fig. 'l) makes-contact during the forward stroke with the arm Ill of a two-armed lever Ill, Ill fulcrummed at Ill and imparts thereto a left hand rotation. To the arm-lll of this lever is Jointed a thrust rod Ill attached to a crank Ill on the shaft Ill and also imparts a left hand rotation.

to the said crank. By the rotation of the flat sided shaft Ill (Fig. 5) the restoration of the two-armed lever Ill, Ill against the action of the spring Ill takes place. This frees the shoulder Ill and the three-armed lever Ill, Ill, III as well as the cam wheel lI positively connected theretofare brought back to the initial position by the action of the spring Ill. The restoration of the flat sided shaft Ill and of the mechanism connected therewith is accomplished after restoration of the pin Ill by means of a spring Ill attached to the thrust rod Ill.

The actuation of the total key and the subtotal key for the drum accumulators isprevented when either one or some or all the levers Ill, Ill, III are not yet in their position of rest. For this' purpose a thrust rod Ill is jointed by means of a pin ill to the arm I (Fig; '7) of the two-armed lever Ill, I which lever on depressing the total key or the sub-total key is actuated by the slide Ill, such thrust rod Ill the shaft Ill there is attached a feeler bar Ill (Fig. 5) which-can make an anti-clockwise rota-- parts Ill, Ill, Ill, I, 2 and'therefore the actuation ofthe total keys. Only after all displaced tens carrying pawls Ill,- Ill, Ill have been brought back to their position of rest by an idle stroke can the total or sub-total keys be actuoperating a crank arm Ill, on the shaft Ill. To

' Anamcnumv'r or ran Emcrsrc Connnc'non AND Common The conductors leading from the contacts 30a. to33i (Fig. 1) actuatable by thecarriage and the key contacts 20. to 2i to the solenoid coils are not led singly to their coils but are combined as separate connection groups toseparate connec tion rings of insulating material as in Figs. 2, 3 and 15. The conductors coming from the keys are led to a connection ring 200 and those coming from the carriage to a connection ring 201. At the connection places in the rings 200 and 201, hubs 202 and 203 of metal and also the associated cable thimbles 2 04, 205'are' riveted. The cables are soldered in their thimbles in the usual man-' ner.

They then remain generally permanently conected with the connection rings so that faulty connections cannot take place and the insertion and removal during assembly and repair of the machine are made extremely simple. The connection rings 200, 201 have their hubs 202,- 203 threaded on studs 206 attached to the coil carrier plate 201 by means of nuts 203, 209, and they are secured to these studs by nuts 210. Upon removing these nuts the rings 200 and 201 with all the connections of a group can be removed as a unit. This gives the advantage that a machine can be set up either for key selection alone or for carriage selection alone, according to the wish of the purchaser in a very simple manner, and employing only normal parts. One of the two connection rings is then simply left off with all the cables attached thereto, and can easily be remounted upon subsequent reconditioning of the machine.

The coil carrier plate 201 of strong insulating material is attached by means of screws 212 to projections 2 (Fig; 3) of the side wall 54 of the drum, and receives the heads of the coil frames 2l3 which are retained by a ring 214 on the other side, which ring is also ofstrong insulating material and connected to the plate 201 by means comprising distance bolts 215, screws '2I6, and nuts 211. The coil windings are all connected at one end through connecting strips 218 to a common bus bar 210 fixed inside the ring 214. On the other side the winding of each coil terminates in a terminal 220, each of these terminals being soldered to a further terminal 221. All the terminals 221 are secured by means of the nuts 209 to respective bolts 206 (Fig. 15) and 302 (Fig. 19) and thus connected with the rings 200, 21". The carrier plate 201 constitutes together with the ring 214, the solenoid coils i la. to Hr, and the associated connecting members, a closed solenoid unit, which by merely removing the screws 212 can be mounted as a unit in the machine and removed therefrom.

The contacts 38 (Figs. 11, 12) for the carriage selection are combined in similar manner to form aneasily mounted and removable unit.

'The contact springs 222 are in the form of inter lacing alternated tongues spaced a very small distance apart and riveted to a housing 223 of bent sheet metal. To prevent them from spring ing from their backing they are held thereto by means of cover plates 224, 225 secured to said backing. For cooperation with the rollers 36 on the carriage the contact springs have resilient projecting bent portions carrying the contacts casing 223 and the contact springs 222.

33 at their free ends. All the contact springs 22: are in conductive connection with the casing 223 and the casing is connected with a common supply conductor 226. A plate 221 f insulating material is inserted in the casing on which are mounted the counter contacts associated with the contacts 38, which counter contacts are riveted to the cable thimiblesl The plate 221 thus constitutes a closed connection unit for all the cables. The plate 221 is connected with the casing 223 by means of screws 232 (Fig. 12) on which distance rollers 233 are mounted, which hold the plate 221 andtherefore the counter contacts 38 at a suitable distance from the front wall of the The plate 221 in its turn is fixed to an angle member 223 by means of screws 230. Instead of nuts, bars 231 (Fig. 12) are arranged on the inside of the plate 221 which are provided with threads for receiving the screws 230. The angle member 229 is attached to the cover plate 234 of the accumulator drum by screws 233 (Fig. '7). This angle member 229 with all the parts mounted thereon constitutes a unit which is easily removable from the machine. 4

The rollers 36 are rotatably mounted on carriers 238 which are mounted by means of screws 231 or other fastenings in bores-238 of a plate 233. This plate 235 is preferably of drawn aluminum and is removably mounted on suitable P jections of the paper carriage 10. The bores 236 are preferably arranged in superposed horizontal -10Ws similar in number to the contact springs 222 for switching in accumulators. Each horizontal row of bores 236 thus serves for switching in a determined accumulator. The distances of the bores 236 from each other within the horizontal rows correspond preferably to the distances of the type carriers I60 and printing types from each other or a multiple thereof. This has the advantage that the roller carriers 238 according to their adjustment can have their rollers 36 cooperate with the contacts 222 at any desired position of the paper carriage, and switch in accumulators 50.

On the plate 235 symbols maybe marked indicating the association of the several bores 236 with the accumulators, on the one hand, and also their horizontal distance, for example, from the beginning of a printing line. This greatly simplifies the mounting of the rollers 36 when it is required to adjust the roller to another accumulator or to another column. The plate '235,with

'all the rollers attached thereto constitutes a closed unit readily adjustable to the paper carriage and readily removed therefrom. Obviously the arrangement may be such that the contacts can be controlled by a separate carriage other than the actual paper carriage, or the plate may be fixed and the contacts mounted on a, carriage.

ACCUMULATORS For. Almn'ron' AND Summoner;

straight rows in series, in this case rack bars 25l with-teeth on their upper and lower edges 

